Basics of Finan...

Find the compound interest on Rs. $$6400$$ for $$2$$ years, compounded annually at $$\dfrac{15}{2}\%$$ per annum.

If money is invested at r percent interest, compounded annually, the amount of the investment will double in approximately 70/r years. If Pat's parents invested $5000 in a long term bond that pays 8 percent interest, compounded annually, what will be the approximate total amount of the investment 18 years later, when Pat is ready for college?

The present population of town is $$12500$$ and it is increasing at the rate of $$8\%$$ per annum. What will be the population of town after two years?

Find the interest for the principal Rs. $$4110$$ at the rate of $$6\%$$ for $$2$$ years.

John earned Rs. $$100$$ as simple interest on Rs. $$600$$ for $$6$$ months. Find the annual rate of interest.

Identify the two statements by which the principal sum can be calculated?
P : The sum amounts to Rs. $$690$$ in $$3$$ yrs at Simple Interest.
Q : The sum amounts to Rs. $$750$$ in $$5$$ yrs at Simple interest.
R : The rate of interest is $$5\%$$ per annum.

Priya invested a certain amount of money and got back an amount of Rs. $$15000$$. If the bank paid an interest of Rs. $$5000$$, what is the amount Priya invested?

In a culture, the present bacteria count was found as $$67,60,000$$. It was found that the number was increased by $$4\%$$ per hour. Find the number of hours before which the bacteria count was $$62,50,000$$.

The present population of a city is $$18522000$$. If it has been increased at the rate of $$5\%$$ per annum, find the population(approx) after $$3$$ years.

Find rate, when principal $$=$$ Rs. $$3000$$; interest $$=$$ Rs. $$400$$; time $$= 3$$ years.